Hi,
I always run special offers, normally monthly ones. During the summer I normally put together packages for holidays with various treatments like manicure, pedicure, eyelash tint etc. Last year I had a promotion on pedicures and I did sooo many and the year before that I did a 3 for 2 on waxing with cheapest area done free. That also went well and I didnt find I lost anything as on average clients would book a leg, bikini and brow wax so to give a brow wax away wasnt going to break bank.
hope this helps